Electronics Worksheet: Electricity Basics Test

Electronics lesson 10: Part 1 test: electricity basics · Set 401 · 40 questions

Remember (Find the topic, use the idea): Find the topic: energy, safety, conductor, closed loop, switches, cells, symbols, series or parallel. Use that lesson’s idea — complete loop, all ON for series, cells add up, one path or many. For sums, write the working and check it again.

1. 1.✏️ In a circuit diagram, which part is drawn as a circle with a cross? (a) voltmeter (b) capacitor (c) bulb (d) switch
2. 2.⚠️ Is it safe to stay away from pylons? (a) not safe (b) safe
3. 3.🔗 Series or parallel circuit: “a single current path”? (a) series (b) parallel
4. 4.True or false: to build with an adult near is safe. (a) False (b) True
5. 5.🔦 A tester circuit has a new cell, a good bulb and wires with a gap between two clips. We put a steel coin across the gap. Does the bulb glow? (a) No (b) Yes
6. 6.⚡ What does a tube light mainly change electricity into? (a) heat (b) light (c) sound (d) movement
7. 7.Which of these is true of a series circuit? (a) each gets the full volts (b) a single current path (c) used in house wiring (d) one out, the rest glow
8. 8.🔁 Is the circuit closed or open if the switch is ON? (a) closed (b) open
9. 9.Which of these mainly makes movement? (a) an electric iron (b) a torch (c) a doorbell (d) a ceiling fan
10. 10.🔗 Series or parallel circuit: “bulbs share the voltage”? (a) series (b) parallel
11. 11.💡 4 identical bulbs are joined in parallel (each on its own side-by-side path) with a battery and a closed switch on the main wire. Bulb 2 is taken out of its holder. Does bulb 3 glow? (a) No (b) Yes
12. 12.🔁 A bulb has two contacts. How many must be joined into the loop for it to glow? (a) only one (b) both of them (c) none (d) it does not matter
13. 13.⚡ What does a street light mainly change electricity into? (a) sound (b) light (c) movement (d) heat
14. 14.True or false: to fly kites in open fields is safe. (a) False (b) True
15. 15.💡 A battery lights 2 identical bulbs joined in series. One more identical bulb is added in series. How do the bulbs glow now? (a) dimmer (b) brighter (c) the same
16. 16.Which drawing is the symbol for a resistor? (a) two or more cell symbols (b) a plain rectangle (c) a circle with a cross (d) a dot where wires meet
17. 17.🔁 Is the circuit closed or open if a cell is taken out? (a) open (b) closed
18. 18.Which drawing is the symbol for a motor? (a) a circle with V inside (b) a circle with M inside (c) a circle with a cross (d) one tall, one short bar
19. 19.🔌 Which part of a screwdriver should an electrician hold? (a) the bare end (b) the plastic handle (c) the metal tip (d) the steel shaft
20. 20.True or false: to stay away from pylons is safe. (a) True (b) False
21. 21.💡 In a parallel circuit, one bulb breaks. What happens to the others? (a) they all go out (b) they explode (c) they get dimmer (d) they keep glowing
22. 22.True or false: to dry your hands first is safe. (a) True (b) False
23. 23.Which of these means the circuit is open? (a) the switch is ON (b) the loop is complete (c) a wire is cut (d) all wires are joined
24. 24.True or false: if the loop is complete, the circuit is closed and current flows. (a) True (b) False
25. 25.True or false: a circle with M inside is the symbol for a motor. (a) False (b) True
26. 26.Which of these is safe? (a) build with an adult near (b) use a cable with cuts (c) fly a kite near wires (d) touch a switch when wet
27. 27.True or false: a toggle switch stays where you flip it. (a) True (b) False
28. 28.Which of these mainly makes movement? (a) a torch (b) a mixer grinder (c) a traffic signal (d) a street light
29. 29.💡 2 identical bulbs are joined in series with a battery and a closed switch on the main wire. Bulb 1 is taken out of its holder. How many bulbs glow?
30. 30.🔌 Which metal is used for most electric wires at home? (a) glass (b) rubber (c) plastic (d) copper
31. 31.🔗 Series or parallel circuit: “a break stops every bulb”? (a) series (b) parallel
32. 32.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by a ceramic cup. Does the bulb glow? (a) No (b) Yes
33. 33.🔦 A circuit has a new cell, a good bulb and a switch that is ON. One wire has come loose from the cell. Does the bulb glow? (a) No (b) Yes
34. 34.🔦 A circuit has a new cell, a good bulb and a switch that is ON. All the wires are firmly joined. A gap in one wire is bridged by a cotton thread. Does the bulb glow? (a) Yes (b) No
35. 35.True or false: if the switch is ON, the circuit is open and no current flows. (a) False (b) True
36. 36.Which drawing is the symbol for a diode? (a) a straight line (b) a small empty box (c) triangle against a bar (d) a long and a short line
37. 37.💡 A battery lights 2 identical bulbs joined in parallel. One more identical bulb is added in parallel. How do the bulbs glow now? (a) dimmer (b) the same (c) brighter
38. 38.True or false: “bulbs share the voltage” is true of a parallel circuit. (a) False (b) True
39. 39.⚠️ Is it safe to stop if a part gets hot? (a) safe (b) not safe
40. 40.True or false: to build with an adult near is not safe. (a) False (b) True

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